CN200954991Y

CN200954991Y - Hand-pulling block with two-Chain and two-pawl structure

Info

Publication number: CN200954991Y
Application number: CN 200620107295
Authority: CN
Inventors: 邱以刚
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-08-31
Filing date: 2006-08-31
Publication date: 2007-10-03
Anticipated expiration: 2016-08-31

Abstract

The utility model discloses a spanner calabash with double chain and double detent structure, comprising a main body structure, a ratchet wheel spanner structure, a driven chain wheel structure, a block cable plate and a work chain. The chamber inner setting made up of the main structure has preventing reverse revolving gear gearing device and chain wheel gearing. Ratchet wheel spanner structure comprises a hand wheel in the gear shaft of the sequent assembly, a ratchet wheel and a handle assembly, a big ratchet wheel and lifting & falling detent. The driven wheel structure comprises driven chain wheel and the driven chain wheel shell body. The block cable plate groupware comprises upper sling hoop and lower sling hoop. The work chain between main body and the driven chain wheel structure is two lines. One side of the work chain is through pin coving in the main shell body. The other side goes through the chain wheel, the main shell first chain pole, the chain wheel principal axis of the chain wheel gearing, and the second chain hole of the main shell cover in turn. The cushion spring is positioned in the other terminal of the work chain. The terminal of the cushion spring is connected with the anti-loosing steel ring.

Description

Lever Blocks with double-stranded two pawl structures

Technical field

The utility model relates to field of mechanical manufacture technology, particularly is applied in the Lever Blocks with double-stranded two pawl structures of lifting, traction, elevator operation.Be particularly useful for the aloft work field.

Background technology

At present, the Lever Blocks of domestic production, be based on steel, iron material, and the chain that uses all is common chain, diameter is all between 6mm～10mm, use the comparison heaviness, particularly when the special occasions operation, heavy instrument does not still all reach desirable effect in operation undoubtedly on work efficiency.

The applying date is that " Lever Blocks " (notification number is CN2637460Y) of the Chinese utility model patent ZL03230717.9 on April 23rd, 2003 just belongs to this kind, it is connected by the coexist commutation ratchet engaged of sprocket wheel axle head of shell, sprocket shaft, sprocket wheel, Handleset, brake assemblies, commutation ratchet, sprocket shaft still is an one with sprocket wheel, and the sprocket wheel axle head connects left and right steel bushing.Can't solve but use the heavy problem of comparison, especially can not be suitable for the needs of special occasions such as aloft work.Because of its equipped chain insufficient strength; Design does not constitute the power that subtracts of assembly pulley form, lacks double insurance at secure context, uses dangerous reliable.

Summary of the invention

Technical problem to be solved in the utility model is at above-mentioned deficiency, provides a kind of simple and compact for structure, in light weight, and anti-the reverse is safe and reliable, uses the Lever Blocks with double-stranded two pawl structures of light and handy flexibly suitable aloft work.

The utility model solves the problems of the technologies described above the technical scheme that is adopted: have the Lever Blocks of double-stranded two pawl structures, comprise matched main body mechanism, free wrench mechanism, driven sprocket mechanism, Carcel board component and work chain; Main body mechanism comprises equipped mutually main casing and main casing lid, and the cavity that both constitute is built-in with anti-backoff teeth wheel transmission device and sprocket transmission device; Free wrench mechanism includes handwheel, ratchet handle assembly, large ratchet and the rise and fall ratchet on the gear wheel shaft that is fitted in proper order in the main casing; Flower wheel mechanism comprises driven sprocket and driven sprocket housing; The Carcel board component comprises hook and following suspension hook, connects top and driven sprocket lower housing portion at main casing respectively; The measure of taking comprises: the work chain between main body mechanism and driven sprocket mechanism is two row; Work chain one end via pins is sleeved on the main casing, the work chain other end in proper order through around sprocket wheel, the main casing that runs through mutually cover first cross chain cylindrical void, around sprocket transmission device in sprocket spindle, the main casing that runs through mutually cover second cross chain cylindrical void, this work chain other end is with recoil spring, the recoil spring end has connected the anticreep steel ring, and this anticreep steel ring connects the chain link of work chain the other end.

The measure of taking also comprises: main body mechanism drives work by free wrench mechanism, the handwheel that free wrench mechanism comprises is equipped mutually with the ratchet handle assembly through two socket head cap screws, the gear wheel shaft of ratchet handle assembly in matched large ratchet connects main casing, large ratchet is combined with and controls, clockwise moving rise and fall ratchet, and this rise and fall ratchet is hinged on the handle assembly port part; And large ratchet is assemblied in and stretches out on the outer gear wheel shaft of main casing; Produce when preventing that the large ratchet forward and backward revolution is moving and reverse, be connected with the braking ratchet of the anti-reverse that is used to cooperate large ratchet on the main casing through first bearing pin; Locate through contraction spring braking ratchet end, thereby guaranteed reliability during operation and safety.

The ratchet handle assembly comprises the grip rubber of forming one.

To reverse in order reaching to produce when more failure-free prevents that the large ratchet forward and backward revolution is moving, to be connected with the anti-reverse ratchet that is used to cooperate large ratchet and braking ratchet through second bearing pin on the main casing; Locate through contraction spring anti-reverse ratchet end; Braking ratchet one end is spacing by anti-reverse ratchet, and the other end then makes to be against behind the fulcrum between cog of large ratchet by the sprocket spindle in the sprocket transmission device, and corresponding with the teeth directional of large ratchet; The rise and fall ratchet that is hinged on the handle assembly port part has down, puts and a neutral gear position along two control gears.

The effect of recoil spring is to utilize recoil spring upper port diameter to cover aperture, second hole greater than main casing, and purpose is to block main casing to cover second hole, prevents to be enclosed in recoil spring work chain and covers the second hole slippage from main casing and go out, and causes accident to take place.

Be provided with equipped mutually sprocket shaft and driven sprocket in the sprocket wheel housing of flower wheel mechanism, the driven sprocket endoporus is equipped with needle bearing; The work chain places between head sprocket and the driven sprocket; Following suspension hook and copper sheathing and hook nut are connected the below in the sprocket wheel housing; The sprocket wheel cap is fixed on the upper end of sprocket wheel housing with socket bolt, sprocket housing covers and has cross chain cylindrical void, the work chain cunning that is positioned at the sprocket wheel housing fits on the driven sprocket wheel track, slides arbitrarily so that the work chain is free on the driven sprocket wheel track, accepts the work that lifting is finished in control.

Compared with prior art, the work chain of the utility model between main body mechanism and driven sprocket mechanism is two row; Work chain one end via pins is sleeved on the main casing, the work chain other end in proper order through around sprocket wheel, the main casing that runs through mutually cover first cross chain cylindrical void, around sprocket transmission device in sprocket spindle, the main casing that runs through mutually cover second cross chain cylindrical void, this work chain other end is with recoil spring, the recoil spring end has connected the anticreep steel ring, and this anticreep steel ring connects the chain link of work chain the other end.The main body of its high-strength light, the high-strength alloy steel link chain, have compact conformation, in light weight, oad is little, easy to carry, safe and reliable, long service life, hand are pulled advantages such as power is little, wearing and tearing are little, the anti-reverse used lightly flexibly, is suitable for aloft work.Step on bar, the burden that can lighten one's labor when stepping on tower, more can be laborsaving in the use, economize merit, thus improved work efficiency.

Description of drawings

Fig. 1 is the utility model embodiment integral structure cross-sectional schematic;

Fig. 2 is main body mechanism and a free wrench mechanism assembling scheme drawing among Fig. 1;

Fig. 3 is a ratchet handle assembly assembling cross-sectional schematic among Fig. 1;

Fig. 4 is a driven sprocket mechanism cross-sectional schematic among Fig. 1.

The specific embodiment

Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.

Fig. 1 has the Lever Blocks of double-stranded two pawl structures to shown in Figure 4, comprises matched main body mechanism, free wrench mechanism, driven sprocket mechanism, Carcel board component and work chain 37; Main body mechanism comprises that the cavity that both constitute is built-in with anti-backoff teeth wheel transmission device and sprocket transmission device through double-screw bolt 29 and nut 36 equipped mutually main casing 19 and main casing lid 35; Free wrench mechanism includes handwheel 4, ratchet handle assembly 9, large ratchet 13 and the rise and fall ratchet 91 on the gear wheel shaft that is fitted in proper order in the main casing 19; Flower wheel mechanism comprises driven sprocket 41 and driven sprocket housing 44; The Carcel board component comprises hook 1 and following suspension hook 46, connects top and driven sprocket housing 44 bottoms at main casing 19 respectively; Work chain 37 between main body mechanism and driven sprocket mechanism is two row; Work chain 37 1 end via pins 28 are sleeved on the main casing 19, work chain 37 other ends in proper order through around sprocket wheel 41, the main casing that runs through mutually cover first cross chain cylindrical void, around sprocket transmission device in sprocket spindle 27, the main casing that runs through mutually cover second cross chain cylindrical void, these work chain 37 other ends are with recoil spring 371, recoil spring 371 ends have connected anticreep steel ring 372, and this anticreep steel ring 372 connects the chain link 373 of work chain 37 the other end.

Main body mechanism drives work by free wrench mechanism, the handwheel 4 that free wrench mechanism comprises is equipped mutually with ratchet handle assembly 9 through two socket head cap screws 3, the gear wheel shaft that ratchet handle assembly 9 connects in the main casing 19 through matched large ratchet 13, large ratchet 13 is combined with and controls, clockwise moving rise and fall ratchet 91, and this rise and fall ratchet 91 is hinged on handle assembly 9 port part; And large ratchet 13 is assemblied on the gear wheel shaft that stretches out outside the main casing 19; Produce when preventing that large ratchet 13 forward and backward revolutions are moving and reverse, be connected with the braking ratchet 25 of the anti-reverse that is used to cooperate large ratchet 13 on the main casing 19 through first bearing pin 191; Locate through contraction spring 192 braking ratchet 25 ends, thereby guaranteed reliability during operation and safety; Ratchet handle assembly 9 comprises the grip rubber 92 of forming one.

Gear system comprises by gear wheel shaft 17 and round washer 22 and outer-hexagonal nut 23 are equipped and forms and be positioned at main body cover 19 internal upper parts; Sprocket transmission device comprises by sprocket spindle 27 and big gear wheel 34, head sprocket 32, packing ring 48, retaining nut 49 and retaining nut pin are equipped and forms and be positioned at main body cover 19 bottoms.Throwing off head sprocket 32 for preventing that work chain 37 from skidding off, be equipped with stage clip 30 and chain baffle plate 31 between head sprocket and the big gear wheel, guarantee the normal operation of head sprocket 32 and driven sprocket mechanism, is to improve driving efficiency, and head sprocket 32 endoporus are equipped with needle bearing 33.

For making gear wheel shaft can work and don't influence rotational efficiency and resistance to abrasion under no oil condition, the main body cover 19 1 end endoporus of mounting teeth wheel shaft 17 are equipped with composite bearing, and other end endoporus is equipped with composite bearing.

To reverse in order reaching to produce when more failure-free prevents that large ratchet 13 forward and backward revolutions are moving, to be connected with the anti-reverse ratchet 18 that is used to cooperate large ratchet 13 and braking ratchet 25 through second bearing pin 193 on the main casing 19; Anti-reverse ratchet 18 ends are through contraction spring 194 location; Braking ratchet 25 1 ends are spacing by the anti-ratchet 18 that reverses, and the other end then makes to be against behind the fulcrum between cog of large ratchet 13 by the sprocket spindle in the sprocket transmission device 27, and corresponding with the teeth directional of large ratchet 13; The rise and fall ratchet 91 that is hinged on handle assembly 9 port part has down, puts and a neutral gear position along two control gears.

The effect of recoil spring 371 is to utilize recoil spring 371 upper port diameters to cover aperture, second hole greater than main casing, and purpose is to block main casing to cover second hole, prevents to be enclosed in recoil spring 371 work chains 37 and covers the second hole slippage from main casing and go out, and causes accident to take place.

Be provided with equipped mutually sprocket shaft 43 and driven sprocket 41 in the sprocket wheel housing 44 of flower wheel mechanism, the driven sprocket endoporus is equipped with needle bearing 42; Work chain 37 places between head sprocket 32 and the driven sprocket 41; Following suspension hook 46 and copper sheathing 45 and hook nut 21 are connected the below in the sprocket wheel housing 44; Sprocket wheel cap 40 usefulness socket bolts 39 are fixed on the upper end of sprocket wheel housing 44, have cross chain cylindrical void on the sprocket wheel cap 40, be positioned at work chain 37 sliding the fitting on driven sprocket 41 wheel tracks of sprocket wheel housing 44, slide arbitrarily so that work chain 37 is free on driven sprocket 41 wheel tracks, accept the work that lifting is finished in control.For preventing that work chain 37 outwards breaks away from from suspension hook, the Carcel board component is the button 2 of insuring of hinged hook 1, and the hinged following safety catch 47 of suspension hook 46 down.

Principle of work of the present utility model is:

Lever Blocks is a kind of in the bottle gouard moved by hands, belongs to universal type hand traction elevator machinery, can serve as lifting in various engineering, traction, elevator operation.Lever Blocks is to pull handle by the straight line tractive force that lever principle obtains and load is complementary by manpower, acts on a caliper of movement internal burden by turns, drives load running.Operations such as it can promote, draw, descend, calibration.If the configuration special device not only can be done the non-rectilinear towage, and can select suitable operating position very easily, or enlarge its load-carrying capacity exponentially with the facility of less tonnage, for adopting several facility parallel operations than the large-tonnage load.

The utility model specifically is work like this:

Rise and fall ratchet 91 is opened, it is thrown off in handle clavula wheel 7 be in neutral position, simultaneously agent structure being braked ratchet 25 opens, and make it throw off at first or selected place when tightening up operation in lifting, suspension hook 1 is fixed in a bit, to be positioned at ratchet handle assembly 9 from the contacting of large ratchet 13, rotate handwheel 4 driven gear axles 17 then, rotate big gear wheel 34 and head sprocket 32 again; This moment friction disc 10, anti-lock rubber ring 11, front friction plate 12, back friction lining 14, and friction wheel 15 all be in off working state.The length of adjusting work chain 37 thus shortens suspension hook 46 and is played weight or tighten up a little distance, and suspension hook 46 is hung on this object.

After dead work finishes, close earlier and brake ratchet 25 and large ratchet 13 interlocks, the rise and fall ratchet of adjusting on the ratchet handle assembly 9 91 is taken turns 7 interlocks with the handle clavula, cw shakes ratchet handle assembly 9 combines closely friction disc 10, anti-lock rubber ring 11, front friction plate 12, back friction lining 14 and friction wheel 15 and large ratchet 13, and turbine is in running order this moment.Cw shakes ratchet handle assembly 9 rise and fall ratchets 91 transmission handle clavulas and takes turns 7 driven gear axles 17, transmission big gear wheel again 34 and head sprocket 13 are in interlocking pattern, front friction plate 12, back friction lining 14 are started working, and weight puts in place or the work of tightening up arrives claimed condition position and fixing up to being risen.Forbid opening anti-reverse ratchet 25 in the work.

Behind the above-mentioned end-of-job, open anti-reverse ratchet 25, adjust the rise and fall ratchet 91 on the ratchet handle assembly 9, rotating counterclockwise ratchet handle assembly 9 makes friction disc 10, anti-lock rubber ring 11, front friction plate 12, back friction lining 14 throw off with friction wheel 15 and large ratchet 13, rotate handwheel 4 again, the length of adjusting work chain 37 is taken out suspension hook 46, end-of-job.

The main body of the high-strength aluminum alloy material that the utility model adopts is compared with steel, iron material human subject, and chemical nature is more stable, is difficult for getting rusty, rupturing; Specific customization high-strength alloy steel link chain, the surface is through the special heavy metal of plating, and its chemical stability improves greatly, more anticorrosive, wear-resisting, non-corrosive, longer service life.In the aloft work field, in light weight, use flexible, hard-packed product step on bar, the burden that can lighten one's labor when stepping on tower, more can laborsaving, province's merit in the use, thus improved work efficiency.

Design of the present utility model, be exactly in principle with practical, efficiently, conveniently be departure point, the main body aluminum alloy materials; Chain strip adoption import high-strength alloy steel link chain; The power that subtracts of assembly pulley form designs safer aspect and has added double insurance, uses reliable especially.

Though the utility model illustrates and describes by the reference preferred embodiment,, those skilled in the art should understand, and in the scope of claims, can do the various variation on form and the details.

Claims

1, the Lever Blocks that has double-stranded two pawl structures comprises matched main body mechanism, free wrench mechanism, driven sprocket mechanism, Carcel board component and work chain (37); Main body mechanism comprises equipped mutually main casing (19) and main casing lid, and the cavity that both constitute is built-in with anti-backoff teeth wheel transmission device and sprocket transmission device; Free wrench mechanism includes handwheel (4), ratchet handle assembly (9), large ratchet (13) and the rise and fall ratchet (91) on the gear wheel shaft that is fitted in proper order in the main casing (19); Described flower wheel mechanism comprises driven sprocket (41) and driven sprocket housing (44); Described Carcel board component comprises hook (1) and following suspension hook (46), connects top and driven sprocket housing (44) bottom at main casing (19) respectively; It is characterized in that: described work chain (37) between main body mechanism and driven sprocket mechanism is two row; Work chain (37) one end via pins (28) are sleeved on the main casing (19), work chain (37) other end pass through in proper order around sprocket wheel (41), the main casing that runs through mutually cover first cross chain cylindrical void, around sprocket transmission device in sprocket spindle, the main casing that runs through mutually cover second cross chain cylindrical void, this work chain (37) other end is with recoil spring (371), recoil spring (371) end has connected anticreep steel ring (372), and this anticreep steel ring (372) connects the chain link (373) of described work chain (37) the other end.

2, the Lever Blocks with double-stranded two pawl structures according to claim 1, it is characterized in that: the handwheel (4) that described free wrench mechanism comprises is equipped mutually with ratchet handle assembly (9) through two socket head cap screws (3), the gear wheel shaft of ratchet handle assembly (9) in matched large ratchet (13) connects main casing (19), large ratchet (13) is combined with and controls, clockwise moving rise and fall ratchet (91), and this rise and fall ratchet (91) is hinged on handle assembly (9) port part; And large ratchet (13) is assemblied in and stretches out on the outer gear wheel shaft of main casing (19); Main casing (19) is gone up the braking ratchet (25) that is connected with the anti-reverse that is used to cooperate large ratchet (13) through first bearing pin (191); Locate through contraction spring (192) braking ratchet (25) end.

3, the Lever Blocks with double-stranded two pawl structures according to claim 1 and 2, it is characterized in that: described ratchet handle assembly (9) comprises the grip rubber (92) of forming one.

4, the Lever Blocks with double-stranded two pawl structures according to claim 2 is characterized in that: described main casing (19) is gone up through second bearing pin (193) and is connected with the anti-reverse ratchet (18) that is used to cooperate large ratchet (13) and braking ratchet (25); Locate through contraction spring (194) anti-reverse ratchet (18) end; Described braking ratchet (25) one ends are spacing by anti-reverse ratchet (18), and the other end then makes to be against behind the fulcrum between cog of large ratchet (13) by the sprocket spindle in the sprocket transmission device, and corresponding with the teeth directional of large ratchet (13); The rise and fall ratchet (91) that is hinged on handle assembly (9) port part has down, puts and a neutral gear position along two control gears.

5, the Lever Blocks with double-stranded two pawl structures according to claim 1 and 2, it is characterized in that: described recoil spring (371) upper port diameter covers aperture, second hole greater than main casing, and purpose is to block main casing to cover second hole.

6, the Lever Blocks with double-stranded two pawl structures according to claim 4, it is characterized in that: be provided with equipped mutually sprocket shaft (43) and driven sprocket (41) in the sprocket wheel housing (44) of described flower wheel mechanism, the driven sprocket endoporus is equipped with needle bearing (42); Work chain (37) places between head sprocket (32) and the driven sprocket (41); Following suspension hook (46) is connected the interior below of sprocket wheel housing (44) with copper sheathing (45) and hook nut; Sprocket wheel cap (40) is fixed on the upper end of sprocket wheel housing (44) with socket bolt (39), has cross chain cylindrical void on the sprocket wheel cap (40), and the work chain (37) that is positioned at sprocket wheel housing (44) is sliding to be fitted on driven sprocket (41) wheel track.